build: compile as esm

package.json

@@ -13,6 +13,7 @@
   },
   "license": "GPL-3.0-or-later",
   "author": "Jeroen de Bruijn",
+  "type": "module",
   "main": "src/index.ts",
   "scripts": {
     "build": "run-s clean compile",

src/input.ts

@@ -1,5 +1,5 @@
 import { getInput } from '@actions/core';
-import path from 'path';
+import path from 'node:path';
 
 export interface EnvironmentVariable {
   key: string;

src/renovate.ts

@@ -1,8 +1,8 @@
 import { Docker } from './docker';
 import { Input } from './input';
 import { exec } from '@actions/exec';
-import fs from 'fs/promises';
-import path from 'path';
+import fs from 'node:fs/promises';
+import path from 'node:path';
 
 export class Renovate {
   static dockerGroupRegex = /^docker:x:(?<groupId>[1-9][0-9]*):/m;

tools/cjs-shim.ts

@@ -0,0 +1,8 @@
+// https://github.com/evanw/esbuild/issues/1921#issuecomment-1898197331
+import { createRequire } from 'node:module';
+import path from 'node:path';
+import url from 'node:url';
+
+globalThis.require = createRequire(import.meta.url);
+globalThis.__filename = url.fileURLToPath(import.meta.url);
+globalThis.__dirname = path.dirname(__filename);

tools/compile.js

@@ -9,6 +9,7 @@ await build({
   minify: !!env['CI'],
   tsconfig: 'tsconfig.dist.json',
   sourcemap: true,
-  // format: 'esm', // TODO: later PR
+  format: 'esm',
   outdir: './dist/',
+  inject: ['tools/cjs-shim.ts'], // https://github.com/evanw/esbuild/issues/1921#issuecomment-1898197331
 });